What action should you take after sending a false Distress alert on Inmarsat-C?

Correct Answer: Option B — Select "Transmit" menu and send a cancel message via the CES used for the Distress alert.

Inmarsat-C false alerts are canceled by sending a specific cancellation message through the same Coast Earth Station (CES) that processed the original distress alert. This procedure is defined in the IMO GMDSS manual to ensure the Rescue Coordination Center (RCC) receives the retraction and terminates the distress status.